It's my subjective impression, but the series feel a bit too repetitive and a bit too reliant on gag for a fantasy one. Give it a try though, it might feel different for you.
EDIT: although note, it isn't so bad as the Elfen Lied anime, where the only thing worth was the intro. (A shame, because the manga was decent.)
The anime also take off a lot of the context from the manga, and this completely destroyed its message/"theme" about "what means 'to be a monster' and 'to be a human', when both behave the same?". That made the violence and gore feel gratuitous.
I still haven't read the manga, If I am honest with myself I think its because the anime turned me off some much. I should probably add it to my read list.